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                                <section class="normal markdown-section">
                                
                                <p>&#x6A21;&#x5F0F;&#x5339;&#x914D;&#x662F; Elixir &#x5F88;&#x5F3A;&#x5927;&#x7684;&#x7279;&#x6027;&#xFF0C;&#x5B83;&#x5141;&#x8BB8;&#x6211;&#x4EEC;&#x5339;&#x914D;&#x7B80;&#x5355;&#x503C;&#x3001;&#x6570;&#x636E;&#x7ED3;&#x6784;&#x3001;&#x751A;&#x81F3;&#x51FD;&#x6570;&#x3002;&#x8FD9;&#x7BC7;&#x8BFE;&#x7A0B;&#xFF0C;&#x6211;&#x4EEC;&#x4ECB;&#x7ECD;&#x5982;&#x4F55;&#x4F7F;&#x7528;&#x6A21;&#x5F0F;&#x5339;&#x914D;&#x3002;</p>
<h2 id="&#x5339;&#x914D;&#x64CD;&#x4F5C;&#x7B26;">&#x5339;&#x914D;&#x64CD;&#x4F5C;&#x7B26;</h2>
<p>&#x505A;&#x597D;&#x5FC3;&#x7406;&#x51C6;&#x5907;&#x4E86;&#x5417;&#xFF1F; Elixir &#x4E2D;&#xFF0C;<code>=</code> &#x64CD;&#x4F5C;&#x7B26;&#x5C31;&#x662F;&#x6211;&#x4EEC;&#x7684;&#x5339;&#x914D;&#x64CD;&#x4F5C;&#x7B26;&#xFF0C;&#x8DDF;&#x4EE3;&#x6570;&#x91CC;&#x9762;&#x7684;&#x7B49;&#x53F7;&#x7C7B;&#x4F3C;&#x3002;&#x5728; Elixir &#x5F53;&#x4E2D;&#xFF0C;&#x7528; <code>=</code> &#x6765;&#x4F7F;&#x5F97;&#x5DE6;&#x53F3;&#x4E24;&#x8FB9;&#x7684;&#x503C;&#x76F8;&#x7B49;&#x3002;&#x5982;&#x679C;&#x5339;&#x914D;&#x6210;&#x529F;&#xFF0C;&#x5373;&#x5DE6;&#x53F3;&#x503C;&#x76F8;&#x7B49;&#x540E;&#xFF0C;&#x8FD4;&#x56DE;&#x8FD9;&#x4E2A;&#x7B49;&#x5F0F;&#x7684;&#x503C;&#x3002;&#x5982;&#x679C;&#x4E24;&#x8FB9;&#x7684;&#x503C;&#x65E0;&#x6CD5;&#x5339;&#x914D;&#xFF0C;Elixir &#x5219;&#x4F1A;&#x629B;&#x51FA;&#x9519;&#x8BEF;&#x3002; &#x6211;&#x4EEC;&#x6765;&#x770B;&#x51E0;&#x4E2A;&#x4F8B;&#x5B50;&#xFF1A;</p>
<pre><code class="lang-elixir">iex&gt; x = <span class="hljs-number">1</span>
<span class="hljs-number">1</span>
</code></pre>
<p>&#x73B0;&#x5728;&#xFF0C;&#x8BD5;&#x4E00;&#x4E9B;&#x7B80;&#x5355;&#x7684;&#x5339;&#x914D;&#xFF1A;</p>
<pre><code class="lang-elixir">iex&gt; <span class="hljs-number">1</span> = x
<span class="hljs-number">1</span>
iex&gt; <span class="hljs-number">2</span> = x
** (MatchError) no match of right hand side <span class="hljs-symbol">value:</span> <span class="hljs-number">1</span>
</code></pre>
<p>&#x7136;&#x540E;&#x8BD5;&#x4E00;&#x4E9B;&#x521A;&#x5B66;&#x8FC7;&#x7684;&#x96C6;&#x5408;&#x7C7B;&#x578B;&#xFF1A;</p>
<pre><code class="lang-elixir"><span class="hljs-comment"># Lists</span>
iex&gt; list = [<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>]
iex&gt; [<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>] = list
[<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>]
iex&gt; [] = list
** (MatchError) no match of right hand side <span class="hljs-symbol">value:</span> [<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>]

iex&gt; [<span class="hljs-number">1</span> | tail] = list
[<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>]
iex&gt; tail
[<span class="hljs-number">2</span>, <span class="hljs-number">3</span>]
iex&gt; [<span class="hljs-number">2</span>|<span class="hljs-number">_</span>] = list
** (MatchError) no match of right hand side <span class="hljs-symbol">value:</span> [<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, <span class="hljs-number">3</span>]

<span class="hljs-comment"># Tuples</span>
iex&gt; {<span class="hljs-symbol">:ok</span>, value} = {<span class="hljs-symbol">:ok</span>, <span class="hljs-string">&quot;Successful!&quot;</span>}
{<span class="hljs-symbol">:ok</span>, <span class="hljs-string">&quot;Successful!&quot;</span>}
iex&gt; value
<span class="hljs-string">&quot;Successful!&quot;</span>
iex&gt; {<span class="hljs-symbol">:ok</span>, value} = {<span class="hljs-symbol">:error</span>}
** (MatchError) no match of right hand side <span class="hljs-symbol">value:</span> {<span class="hljs-symbol">:error</span>}
</code></pre>
<h2 id="pin-&#x64CD;&#x4F5C;&#x7B26;">Pin &#x64CD;&#x4F5C;&#x7B26;</h2>
<p>&#x6211;&#x4EEC;&#x521A;&#x5B66;&#x5230;&#xFF0C;&#x5F53;&#x5339;&#x914D;&#x7684;&#x5DE6;&#x8FB9;&#x5305;&#x542B;&#x53D8;&#x91CF;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x5339;&#x914D;&#x64CD;&#x4F5C;&#x7B26;&#x540C;&#x65F6;&#x4F1A;&#x505A;&#x8D4B;&#x503C;&#x64CD;&#x4F5C;&#x3002;&#x6709;&#x4E9B;&#x65F6;&#x5019;&#xFF0C;&#x8FD9;&#x79CD;&#x884C;&#x4E3A;&#x5E76;&#x4E0D;&#x662F;&#x9884;&#x671F;&#x7684;&#xFF0C;&#x8FD9;&#x79CD;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; <code>^</code> &#x64CD;&#x4F5C;&#x7B26;&#x3002;</p>
<p>&#x4F7F;&#x7528; pin &#x64CD;&#x4F5C;&#x7B26;&#xFF0C;&#x6211;&#x4EEC;&#x5C31;&#x662F;&#x7528;&#x5DF2;&#x7ECF;&#x7ED1;&#x5B9A;&#x7684;&#x503C;&#x53BB;&#x5339;&#x914D;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x91CD;&#x65B0;&#x7ED1;&#x5B9A;&#x4E00;&#x4E2A;&#x65B0;&#x503C;&#xFF0C;&#x8BA9;&#x6211;&#x4EEC;&#x6765;&#x770B;&#x4E00;&#x4E0B; pin &#x64CD;&#x4F5C;&#x7B26;&#x662F;&#x600E;&#x4E48;&#x5DE5;&#x4F5C;&#x7684;&#x5427;&#xFF1A;</p>
<pre><code class="lang-elixir">iex&gt; x = <span class="hljs-number">1</span>
<span class="hljs-number">1</span>
iex&gt; ^x = <span class="hljs-number">2</span>
** (MatchError) no match of right hand side <span class="hljs-symbol">value:</span> <span class="hljs-number">2</span>
iex&gt; {x, ^x} = {<span class="hljs-number">2</span>, <span class="hljs-number">1</span>}
{<span class="hljs-number">2</span>, <span class="hljs-number">1</span>}
iex&gt; x
<span class="hljs-number">2</span>
</code></pre>
<p>Elixir 1.2 &#x5F00;&#x59CB;&#x652F;&#x6301;&#x5BF9;&#x6620;&#x5C04;&#xFF08;Map&#xFF09;&#x4E2D;&#x7684;&#x952E;&#xFF08;Key&#xFF09;&#x4EE5;&#x53CA;&#x5339;&#x914D;&#x51FD;&#x6570;&#x5B50;&#x53E5;&#xFF08;function clause&#xFF09;&#xFF1A;</p>
<pre><code class="lang-elixir">iex&gt; key = <span class="hljs-string">&quot;hello&quot;</span>
<span class="hljs-string">&quot;hello&quot;</span>
iex&gt; %{^key =&gt; value} = %{<span class="hljs-string">&quot;hello&quot;</span> =&gt; <span class="hljs-string">&quot;world&quot;</span>}
%{<span class="hljs-string">&quot;hello&quot;</span> =&gt; <span class="hljs-string">&quot;world&quot;</span>}
iex&gt; value
<span class="hljs-string">&quot;world&quot;</span>
iex&gt; %{^key =&gt; value} = %{<span class="hljs-symbol">:hello</span> =&gt; <span class="hljs-string">&quot;world&quot;</span>}
** (MatchError) no match of right hand side <span class="hljs-symbol">value:</span> %{<span class="hljs-symbol">hello:</span> <span class="hljs-string">&quot;world&quot;</span>}
</code></pre>
<p>&#x4E0B;&#x9762;&#x662F;&#x5728;&#x51FD;&#x6570;&#x5B50;&#x53E5;&#x4E2D;&#x5E94;&#x7528; pin &#x64CD;&#x4F5C;&#x7B26;&#x7684;&#x4F8B;&#x5B50;&#xFF1A;</p>
<pre><code class="lang-elixir">iex&gt; greeting = <span class="hljs-string">&quot;Hello&quot;</span>
<span class="hljs-string">&quot;Hello&quot;</span>
iex&gt; greet = <span class="hljs-keyword">fn</span>
...&gt;   (^greeting, name) -&gt; <span class="hljs-string">&quot;Hi <span class="hljs-subst">#{name}</span>&quot;</span>
...&gt;   (greeting, name) -&gt; <span class="hljs-string">&quot;<span class="hljs-subst">#{greeting}</span>, <span class="hljs-subst">#{name}</span>&quot;</span>
...&gt; <span class="hljs-keyword">end</span>
<span class="hljs-comment">#Function&lt;12.54118792/2 in :erl_eval.expr/5&gt;</span>
iex&gt; greet.(<span class="hljs-string">&quot;Hello&quot;</span>, <span class="hljs-string">&quot;Sean&quot;</span>)
<span class="hljs-string">&quot;Hi Sean&quot;</span>
iex&gt; greet.(<span class="hljs-string">&quot;Mornin&apos;&quot;</span>, <span class="hljs-string">&quot;Sean&quot;</span>)
<span class="hljs-string">&quot;Mornin&apos;, Sean&quot;</span>
iex&gt; greeting
<span class="hljs-string">&quot;Hello&quot;</span>
</code></pre>
<p>&#x5728;&#x4E0A;&#x9762;&#x7684;&#x4F8B;&#x5B50;&#x4E2D;&#xFF0C;&#x5BF9; <code>greeting</code> &#x91CD;&#x65B0;&#x8D4B;&#x503C;&#x53EA;&#x662F;&#x53D1;&#x751F;&#x5728;&#x51FD;&#x6570;&#x91CC;&#x9762;&#xFF0C;&#x51FD;&#x6570;&#x4F53;&#x4EE5;&#x5916;&#xFF0C;<code>greeting</code> &#x7684;&#x503C;&#x4E00;&#x76F4;&#x662F; <code>&quot;Hello&quot;</code>&#xFF0C;&#x4E0D;&#x4F1A;&#x56E0;&#x4E3A;&#x51FD;&#x6570;&#x8C03;&#x7528;&#x800C;&#x6539;&#x53D8;&#x3002;</p>

                                
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